
IES-1248-51V User’s Guide
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CHAPTER 30
2684 Routed Mode
This chapter shows you how to set up 2684 routed mode service.
30.1 2684 Routed Mode
Use the 2684 (formerly 1483) routed mode to have the IES-1248-51V add MAC
address headers to 2684 routed mode traffic from a PVC that connects to a
subscriber device that uses 2684 routed mode. You also specify the gateway to
which the IES-1248-51V sends the traffic and the VLAN ID tag to add. See RFC-
2684 for details on routed mode traffic carried over AAL type 5 over ATM.
•Use the 2684 Routed PVC Screen to configure PVCs for 2684 routed mode
traffic.
•Use the 2684 Routed Domain Screen to configure domains for 2684 routed
mode traffic. The domain is the range of IP addresses behind the subscriber’s
device (the CPE or Customer Premises Equipment). This includes the CPE
device’s LAN IP addresses and the IP addresses of the LAN computers.
•Use the RPVC Arp Proxy Screen to view the Address Resolution Protocol table of
IP addresses of CPE devices using 2684 routed mode and configure how long
the device is to store them.
•Use the 2684 Routed Gateway Screen to configure gateway settings.
• For upstream traffic: Since the subscriber's device will not send out a MAC
address, after the IES-1248-51V reassembles the Ethernet packets from the
AAL5 ATM cells, the IES-1248-51V will append the routed mode gateway's MAC
address and the IES-1248-51V's MAC address as the destination/source MAC
address.
• For downstream traffic: When the IES-1248-51V sees the destination IP address
is specified in the RPVC (or RPVC domain), the IES-1248-51V will strip out the
MAC header and send them to the corresponding RPVC.
30.1.1 2684 Routed Mode Example
The following figure shows an example 2684 routed mode set up. The gateway
server uses IP address 192.168.10.102 and is in VLAN 1. The IES-1248-51V uses
IP address 192.168.10.101. The subscriber’s device (the CPE) is connected to DSL
port 1 on the IES-1248-51V and the 2684 routed mode traffic is to use the PVC
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